Year	Number
2004-01-01	12.5802
2005-01-01	12.4306
2006-01-01	12.6048
2007-01-01	12.7879
2008-01-01	12.7885
2009-01-01	12.8009
2010-01-01	13.4869
2011-01-01	12.5655
2012-01-01	12.6926
2013-01-01	12.5422
2014-01-01	13.3274
2015-01-01	12.9934
2016-01-01	12.9401